<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    body, ul{
      margin: 0;
      padding: 0;
    }

    body{
      /* background-image: url(../images/grid.png); */
    }
    svg{
      /* background-color: rgba(255, 0, 0, 0.1); */
    }
  </style>

</head>
<body>

  <svg width="200" height="200" xmlns="http://www.w3.org/2000/svg" >
    <defs>
      <!-- 高斯模糊的 效果 -->
      <filter id="blurFilter">
        <!--  ......  -->
        <feGaussianBlur stdDeviation="8"></feGaussianBlur>
      </filter>
    </defs>
    <image 
      href="../images/avatar.jpeg"
      width="200"
      height="200"
      filter="url(#blurFilter)"
    >
    </image>
  </svg>

</body>
</html>